Question

Знайти відносні молекулярні маси для: CO2, Zn, H3PO4​

Answer 1

Відповідь:

Mr(CO2)=44 г
Mr(Zn)=65,38
Mr(H3PO4)=98 г

Пояснення:
Mr(CO2)=12+2*16=12+32=44 г

Mr(H3PO4)=3*1+31+4*16=98 г

Answer 2

Molecular Masses of CO2, Zn, and H3PO4

The molecular masses of CO2, Zn, and H3PO4 can be determined by adding up the atomic masses of the constituent atoms in each molecule.

1. CO2 (Carbon Dioxide): - Carbon (C) has an atomic mass of 12.01 atomic mass units (amu). - Oxygen (O) has an atomic mass of 16.00 amu. - CO2 consists of one carbon atom and two oxygen atoms. - Therefore, the molecular mass of CO2 is calculated as follows: - (1 * 12.01 amu) + (2 * 16.00 amu) = 44.01 amu [[1]].

2. Zn (Zinc): - Zinc (Zn) has an atomic mass of 65.38 amu [[2]].

3. H3PO4 (Phosphoric Acid): - Hydrogen (H) has an atomic mass of 1.01 amu. - Phosphorus (P) has an atomic mass of 30.97 amu. - Oxygen (O) has an atomic mass of 16.00 amu. - H3PO4 consists of three hydrogen atoms, one phosphorus atom, and four oxygen atoms. - Therefore, the molecular mass of H3PO4 is calculated as follows: - (3 * 1.01 amu) + (1 * 30.97 amu) + (4 * 16.00 amu) = 98.00 amu [[3]].

To summarize: - The molecular mass of CO2 is 44.01 amu. - The atomic mass of Zn is 65.38 amu. - The molecular mass of H3PO4 is 98.00 amu.

I hope this helps! Let me know if you have any further questions.